Following the general collapse of the UK coal industry, most pits closed during the 1980s and the last deep mine, at Tower Colliery on the north crop, ceased mining in January 2008.
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Until its closure, it was in part supplied with coal from Tower Colliery in Hirwaun.
By the late 1990s, a daily train runs between Ford’s plants at Dagenham and Bridgend and merry-go-round coal trains run between Onllwyn and Cwmgwrach (to the west), Tower Colliery, Newport Docks and Avonmouth (to the east), to Aberthaw power station averaging some 10 trains a day.